package com.example.springboot4.system.config;

import com.example.springboot4.system.constant.FieldConstants;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.http.CacheControl;
import org.springframework.web.cors.CorsConfiguration;
import org.springframework.web.cors.UrlBasedCorsConfigurationSource;
import org.springframework.web.filter.CorsFilter;
import org.springframework.web.servlet.config.annotation.ResourceHandlerRegistry;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurer;

import java.util.concurrent.TimeUnit;

/**
 * 通用配置
 *
 * @author 宋义州
 * @since 2024/1/16 19:59
 */
@Configuration
public class ResourcesConfig implements WebMvcConfigurer {

    /**
     * 资源文件映射配置：
     * * <p>addResourceHandler 指的是对外暴露的访问路径
     * * <p>addResourceLocations 指的是内部文件放置的目录 必须要以 / 结尾
     *
     * @param registry 资源映射配置
     */
    @Override
    public void addResourceHandlers(ResourceHandlerRegistry registry) {
        // 将所有FieldConstants.RESOURCE_PREFIX/** 资源访问都映射到 FileConfigProperties.getProfile()/ 目录下
        registry.addResourceHandler(FieldConstants.RESOURCE_PREFIX + "/**")
                .addResourceLocations("file:" + FileConfigProperties.getProfile() + "/");


        /* swagger配置 */
        registry.addResourceHandler("/swagger-ui/**")
                .addResourceLocations("classpath:/META-INF/resources/webjars/springfox-swagger-ui/")
                .setCacheControl(CacheControl.maxAge(5, TimeUnit.HOURS).cachePublic());
    }

    /**
     * 跨域配置
     */
    @Bean
    public CorsFilter corsFilter() {
        CorsConfiguration config = new CorsConfiguration();
        config.setAllowCredentials(true);
        // 设置访问源地址
        config.addAllowedOriginPattern("*");
        // 设置访问源请求头
        config.addAllowedHeader("*");
        // 设置访问源请求方法
        config.addAllowedMethod("*");
        // 有效期 1800秒
        config.setMaxAge(1800L);
        // 添加映射路径，拦截一切请求
        UrlBasedCorsConfigurationSource source = new UrlBasedCorsConfigurationSource();
        source.registerCorsConfiguration("/**", config);
        // 返回新的CorsFilter
        return new CorsFilter(source);
    }
}
